About custom suggestions

Smart Compose personalized suggestions are tailored to the way you normally write, to maintain your writing style. Only you see your own private, personalized suggestions for your account. No other users, including administrators for your organization, can see your personalized suggestions. When personalization is turned off, you see generic suggestions as you type.

About machine learning

As language understanding models use billions of common phrases and sentences to automatically learn about the world, they can also reflect human cognitive biases. Being aware of this is a good start, and the conversation around how to handle it is ongoing. Google is committed to making products that work well for everyone, and are actively researching unintended bias and mitigation strategies.